- Exceptional Control in Snow and Ice. - Equipped with an exclusive tread design and Stabiligrip, a 3D sipe technology, the new Michelin Pilot Alpin PA4 tire delivers a 10% improvement in snow acceleration and more than a 5% enhancement in handling on snow covered and icy roads - Improved Braking Distance - The new formula of full silica-based rubber compound, Helio Compound , allows the Michelin Pilot Alpin PA4 tire to remain flexible in low temperatures for better winter performance; stopping over 5% shorter on snow, ice and wet roads - Certified By Ultra-High Performance Vehicle Manufacturers. - The new Michelin Pilot Alpin PA4 tire is approved by the high standards of Porsche SE and is currently being tested by many other high-performance vehicle manufacturers.